----- Original Message -----
From: "Joe Subich" <W4TV@subich.com>
To: "'Michael Tope'" <W4EF@dellroy.com>; "'StellarCAT'"
<RXDesign@ssvecnet.com>; "'tower'" <towertalk@contesting.com>
Sent: Tuesday, December 27, 2005 7:26 AM
Subject: RE: [TowerTalk] Holy SteppIR!
>
> Mike,
>
>> The antenna array in question (6 yagi H-frame), has enough
>> gain and is mounted high enough that it is probably starting to
>> look more like a high-gain VHF/UHF array than a traditional
>> stack of HF yagis.
>
> The lobe/null structure of this array is such that the elevation
> would need to be well above 20 degrees before the ground reflection
> disappeared.
>
Yeah, that sounds about right. Below that level, the vertical pattern
nulls shouldn't be affected too much (if at all) by the "tilt".
73, Mike.........................................
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